from sys import stdin
import math
import re
import queue
import numpy as np
from numpy.linalg import matrix_rank

input = stdin.readline

# MOD = 1000000007
MOD = 998244353
 
INF = 122337203685477580

 
def heron(a, b, c):
	d = (a + b + c) / 2
	return math.sqrt(d * (d - a) * (d - b) * (d - c))

def solve():	
    n = int(input().rstrip())   
    print(2017 -n)
    return

if __name__ == '__main__':
    solve()